Secondary rack



Oct. 18, 1932.

C. L. PElRCE, JR

SECONDARY RACK Filed July 25. 1950 2 Sheets-Sheet l Oct. 18, 1932.

C. L. PEIRCE, JR

SECONDARY BACK 2 Sheets-Sheet 2 Filed July 25, 1930 61 20 INVENTOR i a M Patented oct. 18, 1932 UNI-TED sTA -rEs PATENroFFIcE CHARLES a. rnmcnan. or PITTSBURGH,

PENNSYLVANIA, ASSIGNOIR OF ONE-HALF TO. HUBBARD AND COMPANY, A CORPORATION OI" PENNSYLVANIA SECONDARY RACK Application filed July 25,- 1930., Serial No. 470,603.-

This invention relates to. insulator supports and more particularly to the typev known as secondary racks such as are commonly employed for supporting a number of electric wires on poles, walls or the like, and is a continuation in part of my prior Patent 1,779,489 dated Oct. 28, 1930. J

An object of this invention is to provide a device .of the type set forth having an im- LIO proved construction and arrangement.

Another object of this invention is to pro-f vide a secondary insulator rack thatv will be of extremelyrugged and simple construction.

A further object is to provide a secondary insulator racks in accordance :with one em= bodiment of this invention; Fig. 2 is an end view of the blank shown I V in Fig. 1; 1 Fig. 3 is a view similar to Fig. 1, showing the finished rack;

Fig. 4; is aside elevation of the rack shown in Fig. 3;

Fig, 5 1s a partial view in elevation of a modification;

Fig. 6 is a view in elevation'of a modified form of secondary rack; Fig. 7 is a view in section on line'.VIIVII ofFig.6;' a 1 Fig. 8 is a view in section on line VIII VIII of Fig. 6;-and

Fig. 9 is a side elevation of the rack shown "in Fig. 6.

In the drawings, a secondary insulator rack is shown that is made from aunitary' piece of stock metal. i

The insulator rack is provided with spaced "flanges 5 along each side thereofwhich form a base for the rack. The side flanges 5 are connected by a central web 6 joined to the inner. edge of the side flanges by legs 7 The central web 6 has spaced thickened transverse members 8 extending across the web and joining the upper ends of the legs 7,

each crossmember being nearly asv thick as the pro ecting legs 7, as shown in Fig. 2. f Connected to the cross members '8 are thick-' ened members 9 which extend outwardly from the web 6 and form the arms of the" insulator rack. The arms 9 terminate in a rounded boss 10 which has an opening 12 therethrough for receiving the insulator pin" 13 of the usual type on which insulators of the spool type are threaded. Openings 15m provided in the flanged side members 5 for cooperating with the usual supporting bolt.

The insulator rack can be made either by drop forging or by die rolling a piece of stock .metal. In either process, an elongated blank having an irregular cross section is formed.

The central'web '6 of the elongated blank is provided at spaced intervals with the thick- 5 ened cross members 8 having longitudinally 1 extending members .9 extending downwardly therefrom and terminating in a rounded boss 10, which is formed inthe web 6 just above the next cross member 8. The blank so formed is then subjected to cutting and bending operations in which the elongated thickenedmembers 9 and bosses 10 are severed from the middle of the web 6 and bent upwardly to the positions shown inFigs. 3 and 4, wherein they extend outwardly from the cross members'S to form the. insulator supv porting arms.

The openings 15 inthe side members 5 can be formed either during the forging or rolling operation, or during subsequent operations. The severing of the elongated arms from the portion of the web and the bending of the arms upwardly providesaweb with elongated openings 16 flanked by web por- I tions 1'? whichare'capable of cooperating 'with'the usual through-bolts commonly employed for supporting secondary'racks. The

supporting parts of the rack which are sub v V jected tof'the greatest strain are the cross members 8, and the unitary outwardly extending insulator supporting arms 9 which are formed integrally therewith. These parts are, therefore, made much heavier and thicker than the other parts of the rack.

It will be apparent that the blank can be so formed, if desired, that the insulator supporting arms 9 are connected and extend outwardly from the front face of the thickened cross members 8, as shown in Fig. 5, in-

stead of from the bottom thereof. Such an arrangement will provide a slightly greater reach of insulator supporting arm.

In Figures 6, 7, 8 and 9 I have illustrated a modified secondary'i'ns'u'lator rackin which the legs leading from the web to the base portion have been eliminated. This modified form of secondary rack is made from a blank which is formed by "either die'rolling or die forging. The blank has a base portion 20 provided with transverse portions-21 at regular intervalsthroughout the length of the blank. Extending downwardly on the blank; from the transverse;- portions 21 are i arms' 22, 'which terminate in rounded bosses 23 which are formed in the blank slightly above-the'next transverse portion 21. The transverse portions 21 and the'ar'ms' 22 are of greater cross section than theremaining part of the base as is shown in Figures"? and 8:" The arms 22 and bosses 23 are stamped or-cut from the base and are bentoutwardly to form the-insulator supporting arms.

The bosses 23 are provided with openings 24 thr'oughwhich an insulator pin 25 of the usual typeis extendedforholding the insulatorsin! place upon the supporting arms. Openings 26 are formed at regular intervals along- 'th'e-edges of the base 20, through which fastening means are extended for securing the rack to a-wall or pole. In this modification the supportingparts of the rack which are subjected to the greatest strain are the transverseportions=21 and the unitary arms 22 and they are for that reason made heavier andthicker than the "remaining parts of the rack. I p p y y 7 From the above description, it'is readily apparent that a secondary rack of extremely rugged and at the sametime simple construction'is provided and that it is formed by relatively few steps of standard metal working operations.

, Although I have described in detail certain specific forms of this invention and a method of manufacturing the same, it will apparent that various changes, additions,omissions and substitutions can bemadetherein without departing from the spirit of the invention and the'scope'of the appended claims. I p 7 What Iclaim as new and desireto secure by Letters Patent is: p 7 14A blank for a secondary insulator rack comprising a channel body member having transversely extending members of increased thickness on the web thereof. and longitudinally extending members on said Web of inr creased thickness terminating in said transversely extending members.

2. A blank for a secondary insulator rack comprising a body member having spaced transversely extending members of increased thickness and longitudinally extending mem.

versely extending members on the web thereof and'of greater'thicknessf than the; web, and arms severed from said Webandterminating in said transversely extending members for forming insulator supporting members,"s'aid arms being of greater thickness than "said bodyportion. j

' 5. A secondary insulator rack 'c'omprising a body portion having integrallyv formed transverse members of increased cross section',',in-

tegrally formed arms of increased crosssection extending longitudinally of said body,

and terminating in'saidjtransv'erse members, said longitudinally extending arms "being adapted to be severedfrom said body portion and bent outofthe planethereof to form insulator supporting arms.

6. A secondary insulator rack comprising a channel base member, a series of T-shaped members having the tops thereof formed integrally with the web of'said channel andan apertured boss'on the end of the bottom poi tion of each of said T-shaped members, said T-shaped members being of greater thickness member;

in section than the web of said 7. A secondary insulator rack comprising a base, a series of T-shaped members having the tops thereof formed integrally base andan apertured boss on the end of each of said T-shaped members.

ith said 8. A secondary insulator rack comprisinga base, a series of tops formed integrally with said base and having the bottoms thereof extending out? wardly therefrom and an aperturedibosson the end of the bottom portion of each of said T-shaped members for receiving an insulator pin, said T-shaped members being of greater thickness than the thickness of sa id'base. i

9. A secondary insulatorrack comprisinga channeled base, and a series of T-shaped mem bers having the tops thereofformed integrally with the web of said channeled base, the

T-sh aped members having the bottom portion of each of said T-shaped members being bent outwardly from said base to form an insulator supporting arm, said T- shaped members being of greater thickness in section than the Web of said channeled base.

In testimony whereof, I have hereunto subscribed my n ame this 24th day of June, 1930. CHARLES L. PEIROE, JR. 

